Roller-grinding machine.



J. H. K. KIRNER.

ROLLER GRINDING MACHINE.

APPLICATION FILED 001226.1911

1,055,187, Patented Mar. 4, 1913.

UNITED ,siTATEs PATENT loFFroE.

JOSEF HERMANN KARL KIRNER, OF STUTTGART, GERMANY, ASSIGNOR '10v NORMA COMPAGNIE G; `M. B.'H., OF CANNSTATT-STUTTGART, GERMANY, ACO1` \PORATION 0F GERMANY.

To dll whom t may concern.'

Be it /kn'own that I, JOSEF HERMANN KARL KIRNER, a citizenl of-the 'Empire of Germany, and a resident of Stuttgart, in the Kingdom of Wurttemberg, in the Empire of Germany, have invente certain new and useful Improvements in Roller-Grinding Machines, ofwhich the following is a specification'.

This invention relates to roller grinding machines and has for its object to provide improvements therein whereby the velocity of the rollers to be ground is different from l that ofthe grinding disks.

"In roller grinding machines, the rollers to jpengenerally make a rolling move- Y ntV on the Vgrinding surface, which movement is v produced by their being pressed against the grinding surface by a grinding surface which has a speeddiiierent from that of the grinding surface. The rollers therefore at the places which encounter the grinding surface have absolute velocities which areU equal to those of the parts of the grind-ing surface with which they 'are in' contact. v y

Thisv invention consists in providing means whereby these two sets of velocities are differentiated. By these means, a sub- Stantial increase in. the grinding action is Yo tained, by adding a sliding movement in the direction in which the rollers travel to the simple rolling movement of the rollers on'the grinding surface.

-In carrying out the invention various means are Vavailable for making the velocity of the rollersto be ground diierent from that of the grinding disk. For instance, the roller ca e may have a different speed imparted to 1t thany that which corresponds to the average of the speeds of the two disks between ,which the rollers travel, this being ever, be directly braked.

accomplished by separately driving the rollers or.simply by exerting a brake action thereon, The rollers themselves may, how' I In the accompanying'drawings, Figurel is an axial sectionof a grinding machine, having grinding .disksllying substantially horizontally, Fig. 2 re resents a plan-view of the machine, partly 1n horizontal section, on line-2,2, Fig. 1, Fig. 3 shows a detail of oneI form of brake applied to eachl roller individually, and Fig. 4 shows perforated rollers which are braked by means of Specification of LettersiPatent.

ROLLER-GRINDING MACHINE.

. 'Patented Mal-.4,191-3.

Application 1ed0ctober26, 191il'1..-.Serial No. 656,829.

weights centrally applied to a commonaxis passing through the rollers.

Similar letters of reference indicate corresponding parts throughout, the severall figures.

Referring to the drawings, a shaft 2 is mounted in a pedestal 1 and on this shaft is rotatably mounted a wheel 18 which carries an annular grinding disk 5. This is provided with teeth 3 .of a peripheral worm wheel and also with ordinary internal teeth 10. With the peripheral worm wheel or gear, a driving worm 4 gears, but of course the wheel may be driven in any other suitable way. The rollers 8 which are to be ground are pressed on thegrinding disk 5 by means of an annular plate 6 which itself may be loaded in any suitable way, for instance by means of'a Spring 7.

The rollers 8 are carried in a cage 9 driven by means of pins 14. This driving is `effected from the inner toothing 10 on which Vldisk 5. The roll`ers8 thenslide over the grinding disks instead of simply rolling over them as heretofore, and thereby the grinding action is considerably improved 4 and a uniform treatment of the entire sur- 'zo i face of the rollers obtained. Heretofore when the cage was simply carried along by the rollers, each roller would always tend to adapt itself as closely as possible at a certain zone of its surface to the sneed of the grinding disk, so as to be less acted on there than at'other places. x

fIn detail of course the construction of the grinding disks as well as the means for driving them and for driving the cage may be varied. The object sought after by the invention is simply attained by the rollers being compelled to travel at a different absolute peripheral velocity than the parts of the grinding disks with which they are in contact. A .simple 'braking of the cage by means of a brake block or the like may be employed even if such an\a`rrangement is somewhat less advantageous. Fig.\3 shows,

Q H y y 1,055,187

however, how the braking action can be produced. Here the parts 134 used as brake blocks engage substantially above the axis ofV the roller and are simply loaded from above, as indicated by the arrows. In the case 0f perforated rollers a pin or shaft 144, as shown in Fig.y 4, may be passed through the perforations and this pin loaded by weights 155.

I have shown several embodiments of my invention, Jbut it is clear that changes may b'e made therein without departing from theV `spirit of my invention, which consists in providing an improved apparatus by means ofwhich the grinding of the rollers may be perfected, and by which the velocity 1 of the rollers to be ground is caused to be diierent from the velocity of the grinding disks.

Having ,thus described my invention, I claim. as new and desire to secure by Letters Patent:

1; A grinding machine for'treating rollers, comprising means for-grinding the rollers placed substantially radially to the grinding disk, and means for imparting to the rollers a peripheral velocity, theparts of the rollers adjacent the grinding disks having an absolute velocity different from (tihat of the contacting parts of the grinding isks.

2. A roller grinding machine, comprising" superposed grinding disks, means for'rotating said disks, a roller-cage interposed between the disks, and means for rotating the lcage at adifl'erent. speed from the disks. y

3. A roller grinding machine, comprising -rotary grinding disks, a roller-cage interposed between the disks, means for rotating,

the cage at a different speed from the disks,

and means'for exerting a braking actionl on the rollers in the cage.

'In testimony, thiat I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

JOSEF HERMANN KARL KIRNER; 

